Bitzkt



S. V. ROWBHZKY.

DENTAL PLATE.-

APPLICATION FILED MAYiZ. 1919.

1,324,521. I Patented Dec. 9 1919.

V duction of'a .plate in s'rnr nnn v. ROWBITZKY, OF'WASHINGTON, DISTRICT 01 oonu yrmn.

DENTAL PLATE.

To allwlzomgit maylconcern: Be 1t known .that I, STEPHEN V. Row- BITZKY, a *CitlZeD of Lithuania, Russia, resldmgat Washington,.inftheDistrict ofColumbia, have invented certain newy-and useful Improvements in Dental Plates, of which the following is a specification;

This invention relates to certain new 1 and,

useful improvements in dental plates, and contemplates more especially an lmproved -means for conveniently holding said plate in the mouth.

The primary object of my invention is the production ofa relatively light: plate which will not fall, slip, or otherwise :become dislodged fromxthe roof or palatal surface of the'mouth. v V

Anotheri object of:the invention is to produce a dental plate in which positivorotaining means is carried by the plate and arrangedto engage the gums of the wearer in sucha manner as toopreserve for the most part --the .natural gum,.and thereby exhibiting a maximumnumber of teeth as protruding from thesaid natural. gum.

Another. object of the invention is the pro- -which advantages of lightness and comfort to the wearer are made possible .by. the use of a novel retaining means.

With theseand otherobjects in view, the inventionfurtherconsists in the arrange ment, construction, and method of production of the aforesaid invention as -will here inaftercbe describedi and pointed out in the appended claims. 4,

illustrate anembocliment ofmyinvention Figure .lris a perspective view of my improved plate. r v j Fig.-2-is-a;-plan viewthereof;

Fig. :3 is-a'sectionalzview on theline 33 of Fig. .2.

line H of'Fig; 3 through one of the attaching or gum bar. .clasps'.

Fig. ;5 a detail injsection of one of the attaching'bars for gum clasps, and i Fig: 6 isa: plan view'illustrating-the mannor: in which the attaching or gum clasps aregheldcagainst thezside walls of theplate preparatory to investing the same "in, :the-

usual; manner.

v The present invention has been designed gtooveggomezoertain disadvantages now. ex.-

specificationof IettersPatent. Application momm 12, 1,919.

,perienced the the :plate when to prevent discomfiture.

each side thereof are to engage a portion um. o c In :the accompanying drawings -which I engaging with the gums. Fig. 4 is adetail. sectional. view on the of material 1 in cross-sectlon as indicated at=8.' Thisporof which are the slipping or falling ,from the roofof the mouth and theheavinesspf made 'ofgold, Numerous use: ofdental .pla tes, some I attempts have been made to auce uaim and other devices capablev of successfully overcoming these diflicul-ties, but these have been complicated, unsightly andintheflarge 'HRUOHty of cases uncomfortable to the wearer. In the presentinvention itiisposslble to do-awaywith the front portionof the plate, and

adjustable ,members ,for engagement with the gums of-the wearer, whereby should the plate be loose .it ca and if tight it can be Referringlto the drawings in which similar reference characters designate corresponding parts, the plate 1. is illustrated as provided with the well-known suction depression2. and teethB; The plateunaybe made of rubber, gold, alluminum or cellu- -loid, or any other suitable material, and .it will be understood that my; invention is applate made ofrtheiaforesa'id plicable to any materials.

provide relatively light'and i i n beeasilytightened sufficiently loosened Toward therear end of the, plate andzupon gum or wall portion at, extending upwardas shown, .andadapted wearer in :the wjelldmown way. rela- I or clasps 5 are preferably made, ofrmetal,

tively large spaceqor opening spans'these gjumlwalls 4 and into V e etween, are,attach- .ing gum bars orclasps '5. These gum bars,

. and are relatively-thimyielding and flexible I whereby they canbe'readily adjusted for embodiment of'on'e typetof gum bar or clasp 'is' illustrated in Fig.

6 and 7 joined by an intermediate portion tion 8 is of preferably formed semi-circular,

5, and as i shown comprisesopposite thin and fiat ends perspective view partly;

relatively reduced size, the flat portion thereof'being adapted-to'lie against beingexposedttosview. I V i V v Each endof the gum-barb, is-provided with a series of' the gums, and the arcuate or, curved portioni I notches 9, 11 1 1 pnrlposefof .which is-to facilitate the adhesion" of. the

it is preferable to coat the inner side end 7' wlth a softer material 11, such as rubmaterial from which the plate is made when attaching the same thereto. This or any other means of roughening the respective ends of the bar 5 may be resorted to for purposes of facilitating the adhesion of the material as will be readily understood.

The attaching gum bars or clasps 5 are preferably vulcanized to the plate when being manufactured, and as shown in Fig. l, the end 6 of each bar is securely molded within each wall a of the plate. The end 7 of the gum barb is preferably coated or incased in the material from which the plate is made as clearly shown in Fig. A. The coating is preferably of a hard pinkish rubber indicated at 10 and is preferably tinted to match the color of the gums. In praptifie o t e her, so as to insure ease and comfort against the gum.

As shown in Fig. 3 of the drawings, it

will be seen that plate 1 is shaped to conform to the contour of the roof of the mouth, and at the juncture of the tooth with the plate a suitable groove or vide'd as at 12 for the reception of the gum. The gum bars or clasps 5 overlie the gum as will be readily understood and are sufficiently elevated to firmly secure the plate in the mouth, and at the same time expose to view the natural gum. In practice the attaching gum bars or clasps 5 can be readily bent in any one of several directions so as tov provide the correct pressure thereof against the gums. These bars or clasps 5 are very light in Weight, and may be of varying lengths sufficient to provide for the proper clasping action against the gums. As shown'these bars or clasps 5 are spaced apart, and in practice such space may be materially increased or reduced as will be understood.

As shown in Fig. 5 the attaching gum bar or clasp 5 is provided with extending arms 13, the purpose of which is to facilitate the positioning of the bar or clasp in the usual flask when manufacturing the. plate. These arms 13 are shown preferably as attached to the arms 5 but it will be understood that there may be independent bars or other devices used to position the saidclasps 5 within the flask during the manufacture of the plate. In practice it will be usual to manna facture these gum bars or clasps in great quantities and provide for their attachment to plates when being manufactured as will now be described.

The method of producing a plate of this character embodies all of the well-known steps heretofore used, namely, that of taking the impression, the pourin of the plaster of Paris, and making of the model, the articulation thereof, and the teeth in wax.

. sides of depression is pro- 5 produced in which lightness,

setting up of the .It will be noted, however,

that the front portion of the gum covering about eight teeth, more or less, will be eliminated. The gum bars or clasps 5 are now afi'ixed-against the product and are held with wax in position properly spaced from the the flask by the arms 13 as illustrated in Fig. 6. When affixing these gum bars or clasps various adjustments may be made thereof as will be understood. After the proper adjustment of the gum bars or,

clasps, the model is then invested in the flask of plaster of Paris, or similar material,

is allowed to be filled in the usual manner.

When dry, the product is then put in hot water and the wax melted out in the usual manner. The flask used may be of the usual multi-part construction as will be understood.

Rubber or other material from which the plate is to be made is now packed in and around the gum bars and all portions of the plate to form'the same. It is usual to pack pink rubber in the front of the bars that may be exposed to view, and soft rubber in back thereof as has been heretofore mentioned. The vulcanizing of the product then follows. To finish the plate the plaster is broken away and the protruding arms 13- 13 are cutoff and suitably finished so as to r be as nearly concealed from view as possible. From the foregoing it will be obvious that a highly advantageous dental plate has been durability and ease in wearing have been provided. It will be understood that the gum bars or clasps are springlike in their action and can be bent and adjusted after the plate has been produced. Various changes in the form and construction of my invention may be resorted to without departing from the spirit thereof, exact disclosures set forth herein.

I claim 1. A dental plate having a portion for en gaging the roof mg from sald of the mouth, walls extendthe front of said plate, and means carried by said plate and extending into the aforesaid space for securing the plate in the mouth.

2. A dental plate having a portion for-engaging the roof of the mouth, walls extending from said plate for engaging the gums and having a space formed therebetweeninand I do not limit myself to the late for engaging the gums and having a'space formed therebetween in" engaging the gums large space formed therebetween in the front of said plate, and

an attaching bar provided on said plate and extendmg into the aforesaid space against v the gum for securing the plate in the mouth.

4:. A dental plate having a portion for engaging the roof of the mouth, and an attaching bar carried by said plate, said bar having a hard finished material upon the outside thereof, and a soft material upon the inside for engaging the gum and retaining the plate in position in the mouth.

tendin therefrom for engaging the gums in the baa: of the mouth and means carriedby said walls for securing the plate in the mouth so as to display a relatively large portion of the natural gum in the front of the mouth between the aforesaid spaced walls. 7

6. A dental plate having a portion for engaging the roof of the mouth, Walls extending from said plate for engaging the gums and having a space formed therebetween in .the front of said plate, and means carried by said plate for securing the plate in the mouth. V

7 A dental plate having a portion for engaging the roof of the mouth, Walls extending from said plate for engaging the gums and having a space formed therebetween in curing the same in the mouth.

the front of said plate,"and an adjustable attaching device carried by said plate for se- S. A flexible attaching bar for dental plates comprising a relatively thin and light body portion having one end adapted to be secured to said plate and the other end provided with a soft material and arranged to engage the gums of the i 5. A dental plate having spaced walls explates portion having one end adapted to be 9. A flexible retaining bar for dentalsecured to said plateand the other end ar- I ranged to engage the gums of the wearer, and an arm supporting the same against the plate while being secured thereto.

10. The method of producing a dental extending from said plate for plate of the class described, which consists in positioning and affixing a thin bar thereto and spacing the same from the sides of the flask by means of an arm, Vulcanizing the product and cutting ofi' the portion of said arm extending beyond the vulcanized product.

In testimony whereof I affix my signature;

STEPHEN v. ROWBITZKY. 

